Etymology

confocal

C3O1N1F4O1C3A1L1

Today it means: Having the same foci. Full definition →

English focal ← Middle English con- ← Latin con-
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The story

  1. Old Frenchcon-
  2. Proto-Indo-European*ḱe?
  3. Proto-Indo-European*ḱóm
  4. Proto-Italic*kom
  5. Proto-Italic*kom-
  6. Latincon-
  7. Middle Englishcon-
  8. Englishcon-
  9. Englishfocal
  10. English todayconfocal

From con- + focal.

Etymology from Wiktionary, CC BY-SA 4.0.